Sash-fastener



(No Model.)

2 sheets-sheet 1L R. J. BUCHANAN.

SASH FASTENER.

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R. J. BUCHANAN. sAsH PASTENER.

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UNITED STATES PATENT OFFICE.

ROBERT JARVIE BUCHANAN, OF PITTSBURG, PENNSYLVANIA.

SASH-FASTEN ER.

v SPECIFICATION forming part of Letters Patent No. 404,467, dated June4, 1889.

Application filed February 2l, 1889. Serial No. 300,751. (No model.) Y

To all whom t may concern.'

Be it known that I, ROBERT JARviE BUCH- ANAN, a subject of the Queen ofGreat Britain, residing in Pittsburg, in the county of Allegheny andState of Pennsylvania, have invented certain new and useful Improvementsin Sash Locks and Holders, of which the following is a specification.Y

The object of myrinvention is to provide simple, inexpensive, andreadily-manipulated devices' for holding a wiiidow-sa'sli in any desiredposition, and for securely locking the sash to prevent unauthorizedpersons from opening it.

In the accompanying drawings, illustrating` my invention, Figure l is afront elevation of my'improved sash holder and lock, showing also therack-plate in section, with which the holder engages, and the bolt-holefor the locking-bolt. Fig. 2 is an inside view of the lock and holder,showing also the rack-plate in section. Fig. 3 is a front view of therackplate. Fig. 4 is an end view of the lock-frame, showing also theends of the locking-lever and bolt. Fig. 5 is a front elevation ofasurface lock and holder, showing the bell-crank lever arranged tosupport an upper window-` sash and to lock it when closed, the rack-Fig. 6 is an inside view of same with a modiiied rack-plate surface-lockwith my improvements applied. Fig. S is a front elevation of a modifiedform of rack-plate. Fig. 9 is a detail view of the bell-crank lever andits handle; Fig. 10, a detail View of the devices for locking thebellcrank lever to the lock-casing; and Fig. ll is la view of the frontplate of the lock, showing how the bell-crank lever is locked to thecasing.

Referring iirst to the iirst four iigures of the drawings, it will beseen that the bellcrank lever or bolt A is pivoted to the casing orframe B, at a, near its edge. In this instanceI have shown ainortise-lock frame.

The arm of the bell-crank lever projects beyond the side or edge of thelock-frame, and the arm g/ extends downwardly, as shown, and is providedwith a knob C, the shank of which projects through a curved slot c inthe lockfranie, the knob C being on the outside of the frame, so as tobe readily manipulated. The

Fig. 7 is a perspective view of ay slot c is formed in the aro of acircle from the axis of the bell -crank lever A as a center. The outeren'd of the arm is preferably inclined or curved, as shown, and engagesWith the teeth d of the rack-plate D, which is secured to thewindow-frame. Preferably these teeth are inclined or curved, asrepresented, to correspond'with the curvature of the end of the arm soas to afford an even bearing and avoid or counteract the lost motion.v4The tooth 'd3 on t-lie arm m engages with the tooth d2, formed by a`notch d of. rack-plate when the window is closed and is to be locked;but when this device is not used a bolt` E of ordinary construction maybe substituted, which is normally shot out by a spring e, as shown inFig. 2. The bolt is provided with a knob E', the shank of which projectsthrough a.

slot e in the frame or casing B.

It will be understood that when the windowsash is down the tooth d2 ofthe rack-plate D engages with the toothy d3 of the bell-crank lever A,or the bolt E enters the recess E2 in the rack-plate D, as the case maybe, and locks the sash in position, so that it cannot be raised untilt-he bell-crank lever or bolt is withdrawn. The handle or knob E of thebolt being on the inside of the Window it can only be moved by some oneon the inside, thus rendering the sash burglar-proof. When the bolt isdrawn back and the sash is elevated, it may be held at any desiredelevation by means of the bell-crank lever A, the arm .fr of Whichengages with the teeth d in the rackplate.

As will be seen, the lever A is so pivoted, and its arm y is soproportioned relatively to the arm a; that the arm is held in engagementwith the rack by gravity, so that as soon as the window is raised to thedesired position the arm will immediately engage with a tooth cl on therack-plate, and will hold the sash in the position to which it iselevated. Vhen it is desired to lower the sash, the knob C is movedalong the slot c in the direction indicated by the arrow,` and the arm:1:

pieces and the rack, and the rack is arranged between the guide-stripsD2 of the windowframe. The devices when thus arranged are of a suitableconstruction to support a lower window-sash when open or lock it whenshut, or to support an upper window-sash at any desired elevation or tolock it when closed.

` In Figs. 5 and 6 a construction similar to that shown in Figs. l and 2is illustrated, except that the bell-crank lever is reversed and theslot c is in like manner reversed to accommodate the change in positionof the 1ever A. As thus arranged my improvements are adapted to lock alower window-sash when shut or to support it when open, and also tosupport an upper window-sash when in any position, and to lock it whenclosed. Then the tooth d3 on the arm w engages with the tooth 'd2 on therack D, secured to the window-frame,

the sash cannot be lowered without withdrawing the arm into its frame orcasing, and when the tooth d3 engages with the tooth (Z2, as indicatedin Fig. 5, the window cannot be raised without withdrawing the lever therefrom.

As shown more clearly in Figs. l and 3, the rack which I preferablyemploy is provided with curved teeth (Z, which are joined by curvedfront faces d. This construction is desirable, as before explained, toallow the arm to move easily away from the rack or into position in therack when in use.

In Figs. l0 and ll I have shown devices used in connection with myimproved lookin g devices for locking them positively to the casing orframe of the lock. As shown, the shank c2 of the knob C extends throughthe arm y of the locking-lever and is provided on its outer end with aspring c3, which is seated in a recess c'1 in the arm y, and which alsobears against the flange or washerc5, secured to the end of the shankc2.

The front plate of the casing is provided with a curved slot c, asbefore explain ed,.and this slot is formed at intervals with notches orrecesses c', with which engage teeth or lugs c6 on the shank c2 of theknob C. Vhen the teeth thus engage with the notches in the slot, theknob cannot be moved back and forth in line with the slot to manipulateor move the locking-lever A; but by drawing out the knob against theforce of the spring c3 the teeth will be withdrawn from the slot e andthe knob, shank, and teeth may be turned so as to assume the generaldirection of the slot and may be readily moved back and forth to operatethe locking-lever.

It may sometimes be desirable to apply my improvements to a window-sashwhere it would be undesirable to cuta very large mortise for the casin gwhich would tend to weaken the frame. Vhen this is the case, I employ asurface frame or case, such as shown in Figs. 5, 6, andl 7.

My improved sash locks and holders are especially designed for use inconnection with sashes without counterbalancingweights such as used, forinstance, in railway-cars* but some forms of the locking mechanism arenot thus limited in their use.

It is obvious that the tooth d3 on the bellcrank lever and the tooth (Z2in the rack-plate may be omitted, as the lever will support and lock asash by reason of the engagement of the end of the arm with the teeth onthe rack-plate; but I prefer to form the lever and the rack asillustrated. It is obvious, also, that the lock may be attached tothewindowframe and the rack applied to the sash.

I claim as of my own inventionl. The combination, substantially ashereinbeforc set forth, of the lock frame or casing, the bell-cranklever pivoted thereto, and having an outwardly-projeeting arm formedwith an outer end curved from the axis of the lever as a center, arack-plate having teeth curved to correspond with the curved end of thearm x, and a handle (l, secured to the inwardly-projecting arm of thebell-crank lever and working in a curved slot in the lock frame oreasing.

2. The combination, substantially as hercinbefore set forth, of the lockframe or casin g, the bell-crank lever pivoted thereto and hav ing anoutwardly-projecting arm and an in wardly-proj ecting arm y, the knob orhandle C, its shank c2, projecting through a curved slot in thelock-casing and through the arm y of the bell-crank lever and adapted toturn therein, a spring interposed between the inner end of the shank andthe bell-crank lever, and the teeth c6 on the shank, which engage withnotches c' formed in the curved slot of theloclccasing, for the purposespecified.

In testimony whereof I have hereunto subscribed my name.

ROBERT JARVIE BUCHANAN. lVitnesses:

` Jas. 1I. MCNALL,

W. H. JONES.

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